The estranged feel judged by a culture that expects family cohesion. Many view a cutoff as a personal failing.
https://www.psychologytoday.com/us/blog/brothers-sisters-strangers/202207/the-stigma-sibling-estrangement?fbclid=IwAR2cNF6t5tHgxiTqpKdshtzyigXB4htDFgrcwApSJTWZVvvIcRgnnYnhFzo